The interest of this paper is the average AoI for each source at the monitor. The average AoI [1]} is the limit of the average age over time: \(\Delta \triangleq \lim _{T \rightarrow \infty } \frac{1}{T} \int _0^T \Delta (t) \text{d}t\) , and for a stationary ergodic system, it is also the limit of the average age over the ensemble: \(\Delta = \lim _{t \rightarrow \infty } \mathbb {E}[\Delta (t)]\) .
